Live › vulnerability › CVE-2026-42897
Go to dashboardMicrosoft Exchange Server has a cross-site scripting flaw in Outlook Web Access: when certain interaction conditions are met, an attacker can get arbitrary JavaScript to run in a user's browser session. CISA lists it as actively exploited.
Summary written from the sources below. Check the originals before acting.
First seen by InfraStack 2026-10-23 19:11 UTC, 5h before NVD. All times on this page are UTC.
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
| Product | Ecosystem | Affected | Fixed in |
|---|---|---|---|
| Microsoft Microsoft | vendor | – | – |
| microsoft exchange server | vendor | = 2016 | – |
| microsoft exchange server | vendor | = 2019 | – |
| microsoft exchange server subscription edition | vendor | < 15.02.2562.043 | 15.02.2562.043 |
Unknown from the sources.
Each row is the first time that source carried this signal. The analyst’s rows are its own findings.
Microsoft Exchange Server contains a cross-site scripting vulnerability during web page generation in Outlook Web Access and when certain interaction conditions are met, arbitrary JavaScript can be executed in the browser context.
CISA required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
This page as .md · .json · in your agent: get_signal("CVE-2026-42897")
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